The bioavailability of hydrophobic drugs can be increasedby strategies designed to enhance the dissolution rate ofthe drug. This has been achieved in many cases byforming a solid dispersion of the drug in a suitable carrieroften a hydrophilic polymer such as polyethylene glyco(PEG). The drug is dispersed in the carrier bycoprecipitation from a suitable solution containing bothdrug and carrier, by melting both components togetheror by some other process involving a phase change. A great number of chemically modified starches have beenmanufactured in the last decade such as cyclodextrins. Complexes are formed through inclusion in the cavity or through interactions with chemical groups. In order to obtain complexation, the compounds have to bind a complex first in solution. From the usual methods of preparation, kneading, coprecipitation, freeze drying, or spray drying, often the spray-drying technique gives the best results. These new derivatives of starch forms inclusion compounds and are best carriers for the monitoring of the dissolution characteristics of the drug.